A game thought to be invented in the small town of Gardnerville, NV by Brenden Keirsey and Joel Potter which is played between two individuals where each player will take turns backhanding in a downward motion the other opponents tit. The first one to give up loses. Adverse effects are cracked or broken ribs, bruising around the chest or collar bone, or death.

"Damn dude, did you see that game of tittyslap that Jose and Juan were playing? that shit was ruthless yo! I know that one of them has to have a broken rib..."